  <!DOCTYPE html>
  <html lang="en">
  <head>
    <meta charset="UTF-8">
    <title></title>
  </head>
  <body>
  <form action="">
    <label >用户名:</label>
    <input type="text" name = "username">
    <br>
    <label >密码:</label>
    <input type="password" name= "password">
    <br>
    <label ></label>
    <input type="button" value="登录">
    <br>
  </form>
</body>
</html>
